A store is an immutable object tree in Redux. A store is a state container which holds the application’s state. Redux can have only a single store in your application. Whenever a store is created in Redux, you need to specify the reducer.

What is Redux store?

Redux is a state container for JavaScript apps, often called a Redux store. It stores the whole state of the app in an immutable object tree. To create a store the createStore(reducer, [initialState], [enhancer]) function is used to create a new store.

What is store and reducer in Redux?

In Redux, a reducer is a pure function that takes an action and the previous state of the application and returns the new state. The action describes what happened and it is the reducer’s job to return the new state based on that action.